Attachment for bag-filling tubes



April 18, 1939.

A. TANGDALL ATTACHMENT FOR BAG-FILLING TUBES Filed NOV. 25, 1938Jwpcmfou Afre d 7&7250562 Patented Apr. 18, 1939 UNITED STATES PATENTOFFICE of Colorado Application November 23, 1938, Serial No. 242,060

4 Claims.

In the cement and other industries, the socalled Bates bag fillingmachine is used quite extensively, said machine having a tubular nozzlethrough which the cement or other finely divided product is discharged.When filling a paper bag, air must escape around the nozzle, and whenfilling a woven fabric sack, the air can, of course, escape through themesh of the fabric. Therefore, the valve of the cloth bag is customarilysmaller than the valve of a paper bag. In recent years, manufacturers ofcement have ground their product much finer, causing difliculties ingetting the bags to hold the necessary ninety-five pounds of cement, dueto the fact that the fineness of the product prevents the air fromescaping from the bags while they are being filled. To overcome thisdifficulty, the nozzle or filling tube, to my knowledge, has beenprovided with external ribs which prevent the filling opening of the bagfrom closing rather tightly around said nozzle or tube, allowing the airto escape more readily, but when the nozzle or tube is profivided withsuch ribs, it cannot be advantageously used for filling fabric sacks. Myinvention,

therefore, aims to provide a device which will readily hold the fillingopening against snug closing around the filling tube or nozzle, whenfilling paper bags, and may be entirely detached from said filling tubeor nozzle when the latter is to be used for filling fabric sacks.

With the foregoing in view, the invention resides in the novel subjectmatter hereinafter described and claimed, description being accomplishedby reference to the accompanying drawing.

Fig. 1 is a side elevation showing the filling tube equipped with theattachment.

Fig. 2 is a longitudinal sectional view illustrating the manner in whichthe attachment prevents closing of the valved filling opening around thefilling tube.

Fig. 3 is a bottom plan view of the tube and the attachment thereon.

Fig. 4 is a vertical transverse sectional view on 5 line 4-4 of Fig. 2.

In the drawing above briefly described, the numeral 5 denotes theconventional filling tube or nozzle and 6 has reference to the usualflange or the like used in connecting the outer end of 50 said tube ornozzle with the machine from which the cement or other finely dividedproduct is discharged. The tube or nozzle 5 with the attachment thereonis insertable through the usual valved opening I of a Bates paper bag 8or, with 55 the attachment removed, is insertable into the valve of afabric sack. When filling a fabric sack, air can escape through the meshof the fabric, but when filling a paper bag, previously sealed with theexception of the valved opening 1, it is necessary that the air escapethrough 5 this opening. My attachment may then be used to prevent theopening from snugly closing around the tube or nozzle 5, and when thesame tube or nozzle is to be used for filling fabric sacks, saidattachment may be readily removed. 10

The attachment comprises a collar 9 to surround the outer end of thetube or nozzle 5, means I!) carried by said collar to enter the opening1 and prevent snug closing of the latter around said tube or nozzle 5,and means H for releasably l5 securing said collar 9 in place upon saidtube or nozzle 5.

Preferably, the collar 9 is a one-piece continuous ring or band, and thereleasable securing means ll may Well be formed by an ordinary 20set-screw. For illustrative purposes, I have shown an ordinary nut l2welded or otherwise secured to the collar 9 in alinement with a radialopening l3 formed in said collar, the set-screw I I being threadedthrough said nut l2 and received 25 in the opening l3 to tightly abutthe tube or nozzle 5 when tightened.

The means In preferably comprises a plurality of fingers welded orotherwise secured at one end to the collar 9 and projecting therefrom tolie 30 against the lower portion of the tube or nozzle 5, to enter theopening 1, and to hold the valve M in spaced relation with said lowerportion of said tube or nozzle. The inner extremities l5 of the fingers[U are curved upwardly to prevent inter- 35 ference with insertion intothe bag opening.

By providing the novel attachment shown and described or a substantialequivalent thereof, said attachment may be quickly and easily applied tothe filling tube or nozzle 5, whenever its use 40 is necessary, that is,when filling paper bags through the usual valved filling opening.Whenever the use of the attachment is not required, that is, whenfilling fabric sacks, it may be quickly and easily removed.

The details disclosed have proven to be of advantage from standpoints ofmanufacture and use and are preferably followed. However, within thescope of the invention as claimed, minor variations may, of course, bemade.

What is claimed is:

1. An attachment for a bag-filling tube insertable into an opening inthe bag, said attachment comprising a collar to surround the outer endof the tube, means on said collar to prevent closing of the bag openingaround the tube, allowing air to escape from the bag as the latter isbeing filled, and releasable means for detachably securing said collarin place upon the tube.

2. An attachment for a bag-filling tube insertable into an opening inthe bag, said attachment comprising a collar to surround the outer endof the tube, spaced fingers secured to said collar and projectingtherefrom to extend along the tube and into the bag opening to preventthis opening from closing around the tube, thereby permitting air toescape from the bag as the latter is being filled, and releasable meansfor detachably securing said collar in place upon the tube.

